Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
September welcomes an average high-temperature of a moderate 15.2°C (59.4°F), not much different from the preceding month. In the month of September, Pennal experiences an average low-temperature of 8.9°C (48°F).Humidity
In Pennal, the average relative humidity in September is 89%.Rainfall
In Pennal, in September, it is raining for 16.4 days, with typically 52mm (2.05") of accumulated precipitation. In Pennal, during the entire year, the rain falls for 212 days and collects up to 785mm (30.91") of precipitation.Snowfall
In Pennal, snow does not fall in June through October.Daylight
In Pennal, the average length of the day in September is 12h and 40min.On the first day of the month, sunrise is at 6:27 am and sunset at 8:03 pm. On the last day of September, sunrise is at 7:16 am and sunset at 6:54 pm BST.
Sunshine
The average sunshine in September is 5.9h.UV index
The average daily maximum UV index in September in Pennal is 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: A daily high UV index of 3 in September leads to these guidelines:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Pennal in September?
What is the average humidity in September in Pennal?
How many days does it rain in September in Pennal?
When it does not snow in Pennal?
What is the average length of the day in September in Pennal?
When are sunrise and sunset in September in Pennal?
How long on average sun shines in September in Pennal?
How high is the UV index in September in Pennal?
Average temperature in September
Pennal, United Kingdom
- Average high temperature in September: 15.2°C
The warmest month (with the highest average high temperature) is July (17.4°C).
The month with the lowest average high temperature is January (5.7°C).
- Average low temperature in September: 8.9°C
The month with the highest average low temperature is August (10.6°C).
The coldest month (with the lowest average low temperature) is February (1.6°C).
Average pressure in September
Pennal, United Kingdom
- Average pressure in September: 1016.1mbar
The month with the highest atmospheric pressure is May (1016.4mbar).
The month with the lowest atmospheric pressure is November (1009.3mbar).
Average wind speed in September
Pennal, United Kingdom
- Average wind speed in September: 13.9km/h
The windiest month (with the highest average wind speed) is December (19.3km/h).
The calmest month (with the lowest average wind speed) is June (12.3km/h).
Average humidity in September
Pennal, United Kingdom
- Average humidity in September: 89%
The months with the highest relative humidity are January, October, November and December (90%).
The months with the lowest relative humidity are April and May (84%).
Average rainfall in September
Pennal, United Kingdom
- Average rainfall in September: 52mm
The wettest month (with the highest rainfall) is December (90mm).
The driest month (with the least rainfall) is May (41mm).
Average rainfall days in September
Pennal, United Kingdom
- Average rainfall days in September: 16.4 days
The month with the highest number of rainy days is August (20 days).
The month with the least rainy days is February (14.3 days).
Average snowfall in September
Pennal, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (61mm).
The months with the least snowfall are June, July, August, September and October (0mm).
Average snowfall days in September
Pennal, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.9 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Pennal, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 48min).
The month with the shortest days is December (Average daylight: 7h and 42min).
- Average sunshine in September: 5h and 5min
The month with the most sunshine is May (Average sunshine: 7h and 0min).
The months with the least sunshine are January and February (Average sunshine: 3h and 12min).
Average sunshine days in September
Pennal, United Kingdom
- Average sunshine days in September: 10.3 days
The month with the most sunshine days is March (12.3 days).
The month with the least sunshine days is August (6.6 days).
Average UV index in September
Pennal, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Pennal, United Kingdom
- Average cloud cover in September: 60
The month with the most cloud cover is December (Cloud cover 69).
The months with the least cloud cover are April and May (Cloud cover 56).
Average visibility in September
Pennal, United Kingdom
- Average visibility in September: 8km
The month with the highest visibility is March (9km).
The months with the lowest visibility are January, February, April, May, June, July, August, September, October, November and December (8km).
